.decontent {
  width: 1100px;
  margin: auto;
  overflow: auto;
  margin-top: 100px;
}
.de-left {
  width: 500px;
  height: 400px;
  float: left;
}
.panel {
  background: white;
  border: 1px solid black;
}
.de-right {
  margin-left: 100px;
  width: 500px;
  float: left;
}
.de-right h1 {
  font-weight: 700;
  margin-top: 20px;
  width: 100%;
  font-size: 25px;
  text-align: left;
}
.de-right p {
  margin-top: 10px;
  width: 100%;
  font-size: 20px;
  text-align: left;
  padding-bottom: 10px;
}
.de-right ul {
  width: 100%;
}
.de-right ul li {
  width: 100%;
  margin-top: 10px;
  list-style: disc;
  font-size: 14px;
}
.de-bottom {
  margin-top: 50px;
  padding-bottom: 30px;
  width: 100%;
  float: left;
  border-bottom: 1px solid rgb(150, 150, 150);
}
.de-bottom ul {
  width: 100%;
  max-width: 800px;
  margin: auto;
  overflow: auto;
}
.de-bottom ul li {
  box-sizing: border-box;
  border: 1px solid white;
  width: 200px;
  height: 200px;
  float: left;
  margin-left: 25px;
}
.de-bottom ul li:hover {
  border: 1px solid rgba(16, 95, 240, 0.5);
}
.de-bottom ul li .bacg {
  width: 100%;
  height: 160px;
}
.de-bottom ul li p {
  width: 100%;
  height: 38px;
  text-align: center;
}
.de-bottom ul li:first-child {
  margin-left: 0;
}
.de-top {
  width: 100%;
  height: 300px;
  background: url("https://www.rayvet.cn/cdn-product/fourcat.jpg");
  background-size: 100% 100%;
}
.de-top1 {
  z-index: -1;
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 300px;
  background: url(/img/fourcat1.jpg);
  background-size: 100% 100%;
}
@media only screen and (max-width: 1100px) {
  .decontent {
    width: 500px;
    margin: auto;
    overflow: auto;
    margin-top: 100px;
  }
  .de-right {
    margin-left: 0px;
    width: 500px;
    float: left;
  }
  .de-right h1 {
    text-align: center;
  }
  .de-right p {
    text-align: center;
  }
  .de-right ul li {
    width: 460px;
    margin-top: 10px;
    list-style: disc;
    box-sizing: border-box;
    margin-left: 40px;
    font-size: 14px;
  }
}
@media only screen and (max-width: 500px) {
  .decontent {
    width: 100%;
    margin: auto;
    overflow: auto;
    margin-top: 100px;
  }
  .de-right {
    width: 80%;
    margin-left: 10%;
  }
  .de-left {
    width: 80%;
    margin-left: 10%;
  }
  .de-right ul li {
    width: 100%;
    margin-top: 10px;
    list-style: disc;
    box-sizing: border-box;
    margin-left: 10%;
    font-size: 14px;
  }
}
